A temporary (two years);greenhouse will be erected at the city of boston composting site. The 28 square ft greenhouse is a heavy duty commercial kit-type structure is made of 1. 9" galvanized steel tubing it is coverered with a 6 mil greenhouse film glazing. The steel frame is bolted to and anchored by a continuous line of pre-cast concrete traffic barriers on each side along the length of the greenhouse. The greenhouse will be heated with composting organic materials and ventilated with roll-up sidewalls. Doors will be installed on each end of the greenhouse.